64513039 has 4 divisors (see below), whose sum is σ = 64819000. Its totient is φ = 64207080.

The previous prime is 64513021. The next prime is 64513069. The reversal of 64513039 is 93031546.

64513039 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 64513039 - 2¹¹ = 64510991 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64513039.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64513069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152664 + ... + 153085.

It is an arithmetic number, because the mean of its divisors is an integer number (16204750).

Almost surely, 2^64513039 is an apocalyptic number.

64513039 is a deficient number, since it is larger than the sum of its proper divisors (305961).

64513039 is a wasteful number, since it uses less digits than its factorization.

64513039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305960.

The product of its (nonzero) digits is 9720, while the sum is 31.

The square root of 64513039 is about 8032.0009337649. Note that the first 3 decimals coincide. The cubic root of 64513039 is about 401.0659879009.

The spelling of 64513039 in words is "sixty-four million, five hundred thirteen thousand, thirty-nine".